Remove implicit conversions from scoped_refptr to T* in cc/trees/

cc/trees/layer_tree_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_impl.h"
 
 #include <limits>
 #include <set>
 
 #include "base/debug/trace_event.h"
@@ skipping 640 matching lines @@
 
 const LayerTreeSettings& LayerTreeImpl::settings() const {
   return layer_tree_host_impl_->settings();
 }
 
 const RendererCapabilitiesImpl& LayerTreeImpl::GetRendererCapabilities() const {
   return layer_tree_host_impl_->GetRendererCapabilities();
 }
 
 ContextProvider* LayerTreeImpl::context_provider() const {
-  return output_surface()->context_provider();
+  return output_surface()->context_provider().get();
 }
 
 OutputSurface* LayerTreeImpl::output_surface() const {
   return layer_tree_host_impl_->output_surface();
 }
 
 ResourceProvider* LayerTreeImpl::resource_provider() const {
   return layer_tree_host_impl_->resource_provider();
 }
 
@@ skipping 735 matching lines @@
 
 void LayerTreeImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
   layer_tree_host_impl_->UnregisterPictureLayerImpl(layer);
 }
 
 void LayerTreeImpl::InputScrollAnimationFinished() {
   layer_tree_host_impl_->ScrollEnd();
 }
 
 }  // namespace cc